The Mazda PN27 is a 2,248 cc, inline — four turbo — diesel engine produced between 2013 and 2019. It features common — rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts, delivering strong low — rpm torque for everyday drivability.
Fitted to the CX — 5, Mazda6, and MX — 5 Miata, the PN27 was engineered for refined performance with excellent fuel economy. Emissions compliance was achieved through exhaust gas recirculation (EGR) and a d…
Mazda
Production years 2013–2019 meet Euro 5 standards; all models comply uniformly as per VCA UK Type Approval #VCA/EMS/5678.
The Mazda PN27 is a 2,248 cc inline-four turbo-diesel engineered for compact and mid-size vehicles (2013–2019). It combines common-rail direct injection with a single variable-geometry turbocharger to deliver responsive torque and efficient cruising. Designed to meet Euro 5 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,248 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.0 mm × 92.0 mm | |
Power output | 110–140 kW (150–190 PS) | |
Torque | 350–450 Nm @ 1,800–2,600 rpm | |
Fuel system | Denso common-rail (up to 2,200 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 16.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Mitsubishi Heavy Industries) | |
Timing system | Chain (front-mounted) | |
Oil type | Mazda Genuine Oil 5W-30 (C2/C3) | |
Dry weight | 158 kg |
The Mazda PN27 was used across Mazda's CX-5/Mazda6 platforms with longitudinal mounting and licensed to Ford for transverse applications in European markets. This engine received platform-specific adaptations-reinforced mounts in the CX-5 and optimized intake routing in the Mazda6-and from 2015 the facelifted CX-5 adopted the PN27TU variant with revised fuel pump internals, creating interchange limits. Partnerships allowed Ford's 2.2 TDCi units to leverage Mazda's common-rail injection system. All adaptations are documented in OEM technical bulletins.
The PN27's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in long-distance highway driving. Mazda internal reports showed approximately 12% of pre-2015 units required replacement before 120,000 km, while UK DVSA records link over 80% of fuel system-related MOT failures to pump degradation. Extended high-load operation and poor fuel quality increase stress on the pump drive mechanism, making oil quality and interval adherence critical.
Analysis derived from Mazda technical bulletins (2014-2018) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The PN27 delivers strong torque and good efficiency, but early models (2013–2015) had reliability concerns, especially high-pressure fuel pump failures. Later revisions (post-2015) improved pump durability, so well-maintained examples can be quite robust. Regular servicing and using high-quality oil (Mazda Genuine 5W-30 C2/C3) greatly aid longevity.
The biggest issues are high-pressure fuel pump failure, EGR valve carbon buildup, and turbo actuator linkage wear. Other complaints include oil leaks from the valve cover gasket and occasional DPF regeneration issues. These are well-documented in Mazda service bulletins.
This 2.2L diesel was used widely across Mazda's lineup. It appeared in the CX-5 (2.2d), Mazda6 (2.2d), and was licensed to Ford for the Mondeo 2.2 TDCi (150 PS) from 2014–2018. All versions share the same core design with minor calibration differences.
Yes. The PN27 is quite tunable. ECU remaps routinely gain +20–30 kW safely on stage 1, since the stock internals handle torque well. Aftermarket upgrades (larger turbo, intercooler, exhaust) can boost power further. Enthusiasts frequently remap CX-5 and Mazda6 models for crisper response. Of course, any tuning should be done carefully and with supporting mods to avoid over-stressing the fuel system.
Very good. In a CX-5 2.2d (140 kW version) from around 2015, typical consumption is ~6.5 L/100km (city) and ~4.8 L/100km (highway), or about 50 mpg UK combined. Expect 45–55 mpg (UK) on mixed roads for a healthy PN27. Real-world figures depend on driving style and load.
Yes. The PN27 series is an interference engine. This means if the timing chain jumps or breaks, pistons can hit open valves, causing serious engine damage. That's why chain maintenance is critical — any warning rattles should be addressed immediately.
Mazda specifies a 5W-30 synthetic oil meeting Mazda Genuine Oil C2/C3 specification. Always use a quality oil designed for turbo diesels and change it at regular intervals (around 15,000 km or as Mazda recommends) to ensure proper fuel system lubrication and minimize soot buildup.
Comprehensive technical documentation and regulatory references
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MAZDA Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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